Filter element



FIG. 1 is a first side view of a filter element according to an embodiment of the design;

FIG. 2 is a front and back side view of a filter element according to an embodiment of the design;

FIG. 3 is a second side view of a filter element according to an embodiment of the design;

FIG. 4 is a bottom side view of a filter element according to an embodiment of the design; and,

FIG. 5 is a top side view of a filter element according to ant embodiment of the design. 

The ornamental design for a filter element, as shown and described. 